package gear.motion.easing {
	public class Sine {
		public static function easeIn(t : Number, b : Number, c : Number, d : Number) : Number {
			return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
		}

		public static function easeOut(t : Number, b : Number, c : Number, d : Number) : Number {
			return c * Math.sin(t / d * (Math.PI / 2)) + b;
		}

		public static function easeInOut(t : Number, b : Number, c : Number, d : Number) : Number {
			return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
		}
	}
}
